Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd904f7e9d33eab0…

MALICIOUS

PDF

47.5 KB Created: 2020-08-03 03:28:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39f35525410c56ec2e8770c16870387d SHA-1: 5e0a8cfd84407c5618c279c2a4ea37901312f108 SHA-256: fd904f7e9d33eab00ce4b558f2ce01b2bfadd6ced99c055cccc82506543eabac
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many hosted on 'cdn.shopify.com'. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, though heavily obfuscated, contains the malicious URL, suggesting the document's primary purpose is to lure users to this external site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=python+dice+roll
    • http://files.socialworkfootprints.org/uploads/1/3/0/8/130813134/gosetuk-setiveforobuk.pdf
    • http://files.oneeightypetals.com/uploads/1/3/1/6/131606248/kulisitufid.pdf
    • http://files.nyhoneybuzz.com/uploads/1/3/1/4/131438442/4629952.pdf
    • http://files.nanopintechnologies.com/uploads/1/3/2/6/132681513/8415462.pdf
    • http://files.lavenderlanemi.com/uploads/1/3/1/0/131069899/cd9d470.pdf
    • https://cdn.shopify.com/s/files/1/0430/8425/1285/files/zilavizilolibeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/pebugakudadagaxesagoxiva.pdf
    • https://cdn.shopify.com/s/files/1/0433/8139/1514/files/20776519454.pdf
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/jakifol.pdf
    • https://cdn.shopify.com/s/files/1/0433/3725/3023/files/bollywood_party_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/19062118549.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8511/files/36852528784.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/22969980865.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/gozanidolafofatuzexeduf.pdf
    • https://cdn.shopify.com/s/files/1/0432/3734/3387/files/the_getaway_black_monday.pdf
    • https://cdn.shopify.com/s/files/1/0438/5754/3328/files/49312959727.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/harry_lorayne_memory_book.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aa0.bin
0cd7173cda7b8f6e84b72ca5482f55b75f9ee7bce90126412f902f4873288371		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA0 4744 bytes
font_01_sfnt_off00008ac4.bin
55c9382a4952eff615c40d57b92c46306259ca947b1566537213558eed23498e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC4 11096 bytes

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